Waters (1975) reported that no trout eggs or fry were ever found in stomachs of the slimy sculpin, Cottus cognatus, in \Ialley Creek, t~innesota. Because it is so difficult to study deepwater sculpin, little is known about their mating systems. Google Scholar. The slimy sculpin has been studied in waters where there is current acidification (water that is more acidic). Inhabits rocky riffles of cold streams, rocky areas of lakes (commonly at 90-106 m depth), springs and their effluents (Ref. Quantitative methods in electrical fishings in Swedish salmon rivers. A 3-inch adult slimy sculpin. whether slimy sculpin would spawn in the study. The responses of slimy sculpin and white sucker differed, perhaps in relation to differences in life history characteristics. 1976. Slimy Sculpin (Cottus cognatus) - Native. Incomplete lateral line ends under soft dorsal fin. 5723).Moves into shallow water to spawn (Ref. Mottled brown with dark blotches over entire body and fins. Three pelvic fin rays. Crossref. Reproduction. Transactions of the American Fisheries Society, 130: 1106–1115. the two study reaches in 1998, 56 per stream on. The sculpin were found to be less active and have lower rates of reproduction when found in these waters. Fish were pooled across years as it was difficult to ob tain all sizes of gravid females, especially the very small and large individuals every year. Google Scholar. Karlstrom O. Margin of first dorsal fin normally clear, but turns bright red in spawning males. Slimy Sculpin (Cottus cognatus) General Information Sculpins prefer high gradient waters with rock, gravel substrate, which limits their distribution to the northern waters of the state. Zoon, 4: 53–63. Slimy sculpin reproduction.—T o determine. Native Range Northern North America to extreme northeastern Siberia. In North America, it occurs from 27547).In some areas, they are common in brackish water (Ref. Slimy Sculpin Reproduction 385 Fecundity was determined for slimy sculpins col lected near Olcott and Nine Mile Point, New York during April to May in 1989, 1991, and 1993. Results from this study indicate the slimy sculpin is a suitable fish species for monitoring rivers that receive multiple industrial and municipal effluents. 27843), presumably moving to and from fresh water, at least for spawning (Ref. This project will use genetic testing to explore the survival and reproduction rates of slimy sculpin (Cottus cognatus, a small, bottom-dwelling forage fish) translocated into several southern Minnesota streams. The slimy sculpin has been studied in waters where there is current acidification (water that is more acidic). They are intolerant of impaired water qualities. Identification. streams, we released equal numbers of fish into. The influence of acidic runoff episodes on slimy sculpin reproduction in Stone Run. 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